burdsall



(No Model.) 4 'sheets sheet 1.

E. BURDSALL, Jr.

BOLT HEADING MAGHINE.

No. 399,828. Patented Mar. 19, 1889.

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(No Model.) -4- Sheets-Sheet 2.

E. BURDSAL L, Jr.

BOLT HEADING-MAGHINE.

No. 399,828. Patented Mar. 19, 1889.

35 )Zawmoww '(No Model.) 4= Sheets-Sh eet 4.

E. BURDSALL, Jr.

BOLT READING. MACHINE. No. 399,828. Patented Mar. 19, 1889.

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Tfi!=lE UNITED TATFS arnnr rricn.

ELLIVOOD BURDSALL, JR, OF PORT CHESTER, NEIV YORK, ASSIGNOR OF ONE-HALFTO RICHARD H. BURDSALL, OF SAME PLACE.

BOLT-HEADlNG MACHINE.

SPECIFICATION forming part of Letters Patent No. 399,828, dated March19, 1889. Application filed Ap il 28, 1888. Serial No. 272,134. (Nomodel.)

To all 1071/0712 it may concern.-

Be it known that I, ELLWooD BURDsALL, J12, a citizen of the UnitedStates, residing at Port Chester, in the county of I'Vestch ester andState of New York, have invented certain new and useful Improvements inBolt-Heading Machines; and I do hereby declare the follow ing to be afull, clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame.

My invention has for its object to simplify and improve the constructionof this class of machines. With these ends in view I have devised thenovel construction of which the following description, in connectionwith the accompanying drawings, is a specification, numbers being usedto denote the several parts.

Figure 1 a plan view of the entire machine, a portion being broken awayto show the construction more clearly, the headingram being at itsextreme forward position Fig. 2, a detail side elevation of the rightside of the machine, as seen in Fig. 1; Fig. 3,21 longitudinal sectionon the line in Fig. 1, the plunger being at its retracted position; Fig.4, a longitudinal section on the line y 3 in Fig. 1, the plunger beingat a position approximately midway between the extremes of its movement;Fig. 5, a longitudinal section on the line y y in Fig. 1, the plungerbeing at its extreme forward position, as in Fig. 1; Fig. (3, a detailcrosssection, on an enlarged scale, on the line z .2 in Fig. 1; Fig. 7,a detail side elevation, on an enlarged scale, of the carrier and one ofthe cutters, the position of the parts being reversed, theview beingfrom the opposite side to that in Fig. 6; Fig. 8, a detail viewillustrating the adjustment of the cutter and carrier and also the stop,whereby the length of wire cut at each operation is determined; Fig. 9,a detail sectional view on the line .9 s in Fig. 8; Fig. 10, anelevation, as seen from the inner side of the receiver detached, theends of the grippers appearing in elevation. Figs. 11, 12, and 13 arediagrams illustrating steps in the operation of heading a bolt, moreespecially a plow-bolt; and Fig.

14c is a view of a plow-bolt as formed by my improved machine.

The present machine is adapted for the manufacture of all classes ofbolts, an important improvement in operation being that the blank is cutoff and carried in front of a suitable die and then forced into the dieby an upsetting-punch, the inner end of the blank resting against aplunger supported by a yielding stop, whereby I am enabled to greatlyincrease the speed of the machine, as the headed bolts can be expelledwithout difficulty, there being no binding of either bolt or head in thedie. I am furthermore enabled to produce perfectly-formed heads upon allclasses of bolts. In practice I have found my improved construction tobe especially valuable in the manufacture of plow-bolts, which areordinarily made with a double head, there being a squared head to engagethe plate under the share and an outer head which engages the share andis ground down smoothly. Heretofore in the manufacture of this class ofbolts by machinery it has been difficult to produce the squared portionof the head at a reasonably high rate of speechas sufficient metal couldnot be displaced laterally to fill the recess in the die, the tendencybeing to crowd the metal forward, which caused the shank to bind in thedie and rendered the operation of expelling the headed bolts difficultand necessarily reducing the speed of the machine.

1 denotes the bed or frame of the machine; 2, the shaft to which poweris applied by a belt (not shown) running over a wheel, 3, on said shaft.The movements of the several parts of the machine are all imparted fromshaft 2 by means of crank-pins l and 5 at the left and right ends of theshaft, respectively, and an eccentric and strap at the center of theshaft. The bed is supported on suitable legs, denoted by 7. 8 and 9denote, respectively, the upper and lower feed-rollers, and 10 and 11,respectively, their shafts. The feed-rollers are provided withsemicircular grooves in their edges and hold the Wire with sufiicientpressure to feed it forward positively. Shaft 10, carrying the upperfeeddisk.

roller, is pivoted to a bracket, 12, projecting outward from the bed insuch a manner as to give the upper roller a vertical adjustment in orderto regulate the pressure upon the wire.

13 is a set-screw bearing against the journal-box of the upperroller-shaft, whereby its adjustment is regulated. The feed-rollershafts are provided with gears 14, (one only being shown,) which engageeach other. Motion is communicated to the shaft of the lower feed-rollerfrom shaft 2 by means of a connecting-rod, 15, the ends of which aresecured, respectively, to crank-pin 4 and to a double disk, 16, whichoscillates on shaft 11.

17 is a ratchet rigidly secured to shaft 1.1, which is engaged by pawls18, carried by the 19 denotes springs connected to the shanks of thepawls, which act to hold the pawls in engagement with the ratchet. Thisconstruction being in common use, does not require a detaileddescription.

It will be seen that each rotation of crankpin 4 imparts an oscillationto the disk, which in turn, by means of the pawls, imparts a forwardmovement to ratchet 17 on shaft 11, thereby actuating the feed-rollers.Any required adjustment of this portion of themachine is secured bymoving the crank-pin in or out, it being carried by an ordinary dovetailblock (not shown) sliding in disk 20 at the end of the shaft. As thewire is fed forward by the feed-rollers, it passes through a tube, 21,rigidly secured in the framework, then through a tube, 22, rigidlysecured in a die-block, a3, and then through a short tube, 2i, made oftempered steel, which serves as the stationary member'of the cuttingdevice.

25 denotes a movable cutter, carried by a block, 26, adj ustablyconnected to a crossslide, 27, as will presently be explained.

The thrust of the movable cutter in the act of cutting is sustained by aset-screw, 23, in the frame-work, which bears against the die-block. Thecross-slide is bifurcated, as shown, and embraces a slide, 31, having acam-slot, 32, which is engaged by a roller, 33, carried by thecross-slide. The shape of camslot 32 is clearly shown in Fig. 1.

It will. be seen that each reciprocation of the slide will cause acorresponding reciprocation of cross-slide 27. Motion is imparted to theslide by means of a connectingrod, 34, which is pivoted to the slide andadjustably connected to a block, 35, engaged by crankpin 5 on the mainshaft.

42 denotes spring-arms secured to block 26, having at their forward endsgrippers 43, which hold the blank after it has been severed from thepiece of wire by the cutters and carry it forward to the headingmechanism. These grippers are preferably provided with steel dies 44,which engage the blank.

43 denotes guides in which the grippers slide. The grippers in practiceincline inward slightly, (not shown in the drawings,) and are forcedoutward against the guides when the wire is fed forward between them, sothat the severed blank is held firmly and carried to the proper positionbefore the heading-die when the slide moves forward. As soon as theblank is in position before the die, the header moves forward. andforces it into the die, which movement will be again referred to. Thecross-slide now returns to place, the grippers springing over the blankand leaving it in the die. The movement of the grippers in leaving theblank is shown by the dotted lines in Fig. 7.

It will of course be apparent that delicate adjustments are required toinsure the perfect operation of the grippers in connection withdifferent dies and cutter-tubes, the dies being liable to warp intempering sufficiently to necessitate new adjustments. This I accomplishin the manner which I will now describe.

28 (see Figs. 6 and 8) denotes a screw, one end of which engages arecess in cross-slide 27, and the other end a collar, 29, said collarbeing provided with a groove engaged by arms 26 at the rear end of block26.

30 is a check-nut bearing against the end of the cross-slide which looksthe parts in position after adjustment. This construction enables me toso adjust block 26 and the grippers as to carry the severedblank forwardthe exact distance required to leave it in front of the heading-die, sothat as the header moves forward it will force it straight into the diewithout friction and without the slightest injury to the blank. In orderthat I may be enabled to adjust the throw of the cross-slide on itsreturn movement, so that the grippers shall stop in the exact positionnecessary to receive the wire as it is fed forward, I make cam-slot 32in the slide of greater width than the diameter of roller Theadjustmentis effected as follows:

36 is a cross-head adjustably connected by rods 37 to the cross-slide,and 38 is a bifurcated lever pivoted to the cross-head and to a link,39, the other end of which is pivoted under the frame-work.

4:0 is a spring connected to the lower end of the lever and to the underside of the frame-work, as is clearly shown in Fig. 6.

41 is a threaded rod, which engages the frame-work and projects outward,passing loosely through the cross-head. 41 is a nut at the outer end ofthis rod, which is so adjusted as to stop the outward movement of thecross-head, and consequently of the cross-slide with which thecross-head is rigidly connected, at the exact position necessary toleave the grippers in position to receive the wire as it is fed forward.A check-nut is provided to lock nut 41 in position after adjustment. Itwill thus be seen that as the crossslide is moved inward by theengagement of roller with the cam-slot in slide 31 the movementisagainst the power of spring 40, which will hold the roller inengagement with the outer IIO side of the cam-slot, and on the returnmovement will draw the cross-head and cross-slide outward until themovement of the former is stopped by nut i1 on red 41.

\Vhenthe die has been changed or adjustment of the grippers is requiredfor any reason what ever, slide 31 is thrown to its extreme positionforward, which throws the cross-slide forward also. Check-nut 30 isturned outward and screw 28 turned until the grippers are placed in suchposition that a blank held thereby will pass freely into the die, sothat in use when the header moves forward there will be no possibilityof bending the bolt, or even of pressing it against either side of thedie. Checknut 30 is then turned up tight against the end of the slide,which locks the parts in position. Having effected the forwardadjustment of the grippers, slide 31 is thrown to its extreme retractedposition, which of course retracts the cross-slide also. While the partsare at the extreme retracted position, the check-nut on rod 41 isloosened and nut 41 is either turn ed inward or outward, as may berequired, on red 11, allowing the cross-slide to be moved until thegrippers are just in position to receive the end of the wire as it isfedforward. Having effected this second adjustment of the grippers, nut a1is turned up against the cross-head and is locked there by the checknut.This insures that at each return movement the cross-head and cross-slideshall be stopped at the exact point to permit the grippers to receivethe end of the wire.

to (see Figs. 4 and 6) denotes the headingdie, which is secured todie-block 23 by setscrews 46.

It will of course be understood that the recess in the face of the dieis made the exact shape of the head which it is desired to form upon thebolt.

47 is the header carried by a ram, the con struction and operation ofwhich I will briefly describe.

t8 is a slide supported within the frame work by plates 49, above andbelow, which are bolted thereto. The header is socketed in a block, 50,lying in block 51, which is itself keyed to the slide, as shown inFig. 1. Back of block 50 is a block, 2, and back of block 52 an adjusting-block, 53, which israised and lowered by a set-screw, 54,suitably connected thereto. The back of the adjusting-block is inclinedand bears against a corresponding incline upon the slide, which is ofcourse made very heavy.

55 is an eccentric at the center of shaft 2, 56 the eccentric-strap, and57 the eccentricrod, the forward end of which is pivoted to the slide,as is clearly shown.

58 is a downwardly-extending arm of the eccentric-rod, the function andoperation of which will presently be explained.

It will of course be apparent that when the wire is moved forward by thefeed-rollers the movable cutter must be at its retracted position. Asthe wire is fed forward beyond the cutter-tube, (denoted by 24,) itpasses into a receiver, 59, which is provided with a slot, 60, on itsinner side. (See Figs. 8, 9, and 10.) The length of wire allowed foreach bolt is regulated by means of an adjustable stop, 61, lying in arecess in the receiver, against which the end of the wire is forced asit is fed forward.

This stop is screw-threaded and is held against rotation by a key, 59which engages agroove, 61, in the stop.

62 is a gear socketed in the receiver and provided with an internalscrew-thread engaged by the thread on the stop which passes through it.Gear 62 is operated to move the stop either forward or backward by meansof a gear, 63, carried by a shaft, 64. At the end of shaft 64 is abeveled gear, 65, engaging a corresponding beveled gear on a verticalshaft, 66. This shaft lies within a tube, 67, the upper end of which isslotted, and is engaged by a lock-nut, 68, which clamps the slotted endof the tube upon shaft 66,thereby locking it after adjustment. It willbe seen that'rotation of the vertical shaft in either direction will actto move the stop in one direction or the other through the engagement ofthe beveled gears and gears 62 and 63, thereby determining the length ofthe blank allowed for each bolt. The operation of this adjustment willbe apparent from the fact that gear 62, which engages the stop, beingsocketed in the receiver, is held against endwise movement and the stopis locked by groove and key against rotary movement.

69 (see Fig. 3) denotes a recess in slide 48, into which the receiverpasses as the slide moves forward in the operation of heading.

The operation of the machine up to the instant the bolt is ready forheading is as follows: Having effected the necessary adjustments, asalready explained, power is applied and the machine placed in operation.The wire is fed forward until the end strikes stop 61. The movablecutter carried by cross-slide 27 moves forward and severs the piece ofwire in the receiver'i. 6., the blank from the main piece of wire. Theblank when severed is held by the grippers and carried forward out ofthe receiver by the continued forward movement of the cross-slide, &c.At the instant the blank reaches the opening in the die the headerbegins to move forward and carries the blank into the die. Thecrossslide, block 26, &c., now move backward out of the way, thegrippers springing over the blank as they pass backward, as is clearlyillustrated in Fig. 7.

Turning now to Figs. 4 and 5, just back of heading-die 45 is a tube, 70, preferably made of chilled steel and held in an independent block,which is itself socketed in the die-block. This tube receives the boltas it is fed forward. Back of tube 70 is a tube, 71, also socketed inthe die-block, which receives the end of the bolt and also the reducedend 72 of a plunger, 73, which reciprocates in an opening, 7a, in theframe-work, and in a guide,

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75, bolted to the frame-work. Back of the plunger and in line therewithis an adj ustable stop, 76, carried by a slide, 77. This stop isscrew-threaded and is held against rotation by a key, 7 7 which engagesa groove. (See dotted lines, Fig. 5, in the stop.)

78 is a gear socketed in the slide and provided with an internalscrew-thread engaged by the thread on the stop which passes through it.Gear 78 is operated to move the stop either forward or backward by meansof a gear, 79, carried by a shaft, 80, and engaging gear 78. This shaftpasses through the framework loosely enough so as not to interfere withthe reciprocation of slide 77.

81 is a hand-wheel at the outer end of shaft 80, for convenience inadjusting the stop. The adjustment of this stop is substantially thesame as the adjustment of the stop in the receiver. Gear 78 is socketedin the slide, so as to have no end wise movement, and the stop is keyedto the slide, so that it can have no rotary movement. It follows,therefore, that rotation of said gear must impart longitudin al movementto the stop.

82 is a block adapted to slide on the plun- 83 is a lever, one end ofwhich is pivoted to I said block, its opposite end being pivoted to alink,v84, the opposite end of said link being pivoted to the legs. Lever83 is provided with a pin, 85, and is connected to slide 48 by means ofa rod, 86, pivoted on said pin. During the forward movement of slide 48that is, in the operation of heading a boltblock 82 is carried backward,and when the return movement takes place it engages an enlargement orcollar, 87, on the plunger and forces the latter backward, therebyexpelling the headed bolt from tube and the headingdie, the completedbolts dropping down under the machine into a suitable receptacle. Thisposition of the plunger and block 82 is shown in Fig. 3. Back of slide77, lying in a recess, 88, in the frame-work, is an angleblock, 89. Therear end of this block is rounded and engages a corresponding recess,90, in a block, 91, at the end of the machine. At the forward end of theangle-block and at the rear end of slide 77 are recesses 92, in whichthe ends of a toggle, 93, are socketed, the toggle being of course freeto turn in both recesses. At the lower end of the angle-block is aroller, 94, which engages a cam-groove, 95, in a slide, 96, whichreciprocates in suitable ways in the frame-work, said slide being heldin position by a plate, 97, bolted to the frame-work.

98 is a rod made adjustable as to length in any suitable manner, one endof which is pivoted to slide 96, the other end being pivoted to thedownwardly-extending arm 58 of eccentric-rod 57.

99 (see Fig. 4) is a cross-piece by which slide 77 is held in place, and100 is a recess in the framework, which receives the enlarged portion ofthe slide in which the gears for adjusting the stop are placed, saidrecess being long enough to permit reciprocation of the slide, as willnow be explained.

The operation of heading and expelling a bolt is as follows, (seediagram, Figs. 11, 12, and 13, in connection with Figs. 4 and 5:) At theinstant that the severed piece of wire constituting a bolt-blank hasbeen carried in front of the opening of the heading-die, as has alreadybeen explained, the header begins to move forward and forces the blankinto the die, the inner end of the blank resting against the reduced end7 2 of plunger 73, this reduced end being just the diameter of the wirefrom which the blanks are cut. The position of the parts at this instantis clearly shown in Fig. 11. The grippers now spring over the blank, asindicated in Fig. 7, and return to their normal position. sition of theparts illustrated is in Fig. 4, in which figure, however, the bolt isomitted for clearness of illustration.

It will be apparent that as the header moves forward, forcing the boltinto the die, the plunger will be forced. backward until it comes incontact with stop 76. At the instant the rear end of the plunger comesin contact with the stop the operation of heading will commence. As thebody of the bolt is held firmly in the die and in tube 70 back of thedie, it follows that the metal at the end of the blank outside of thedie will be upset by the header, as is clearly shown in Fig. 12. Inorder to insure that the metal in being upset shall be made tocompletely fill the recess in the heading-die, thus forming a perfecthead, and that the shank of the bolt shall not bind in the die, so thatit may be readily expelled, no matter what may be the length of thebolt, I provide that at a certain. stage of the upset ting of the metalin forming the head of the bolt the stop itself, against which theplunger rests, shall yield sufficiently to allow the entire bolt andhead to be forced farther forward, so that the metal shall be forcedforward into the corner of the heading-recess,

as is shown in Fig. 13, thus forming a perfect head of any style. Theposition of the parts while the first portion of the upsetting of themetal of the head is being accomplished is clearly shown in Fig. 4. Atthe proper time, however, through the rotation of eccentric 55, arm 58will be swung forward. This movement, through rod 98, will force slide96 from the position shown in Fig. 4 to that shown in Fig. 5. Thismovement causes roller 94 to travel down into cam-groove 95, carryingthe lower end of angle-block 89 downward, said block swinging on itspivotal point in block 91, which allows toggle 93 to yield, its forwardend being carried downward, as shown in Fig. 5, which movement in turnpermits slide 77, carrying the adjustable stop to move backward. Thisyielding of the stop will permit the whole bolt to move forward, andwill carry the partiallyformed head clear down into the bottom of Thenext pothe head-forming recess in the die. The for- Ward movement of theheader will continue until it comes virtually in contact with the dieitself, as shown in Fig. 13.

It will of course be understood that in adjusting the machine the lengthof wire allowed for each bolt-blank and the portion of the stops areaccurately adjusted, so that each head is formed perfectly, there beingsufficient metal allowed to fill the headingrecess in the die. Thereturn movements of the parts expel the headed bolt and place the partsin position to receive another blank from the grippers. As slide 48moves backward, it of course swings lever 83 toward the position shownin Fig. 3. This carries block 82 against the collar on the plunger,moves the latter forward, and expels the bolt. The movement of eccentric55, which returns slide 48 and the header to the position shown in Fig.3, also swings arm 58 backward and draws slide 96 to the position shownin Fig. 4. This causes roller 94 to ride up the incline of cam-groove 95and throws the angle-block, toggle, and slide 77 to the position shownin Fig. 5. \Vhen the parts have reached thisposition, the feed-rollerswill have fed forward sufficient wire to form another blank, which willhave passed into the receiver, been severed by the movable cutter, andcarried forward by the grippers, ready to be forced into the die by thenext forward movement of the plunger, these movements being continuouslyrepeated at a high rate of speed, my improved construction being suchthat each head is formed perfectly, no matter how high the machine maybespeeded within reasonable limits.

It will of course be understood that the exact details of constructionshown and described do not constitute the essence of my invention, assaid details may be greatly varied without departing from the principlesinvolved.

Having thus described my invention, I claim 1. The combination, with thefeed-rollers, a tube for the wire, and cutter-tube 24, of receiver 59and a sliding cutter acting between the receiver and tube 24 to severthe blank.

2. The combination, with the feed-rollers and a tube into which the wirepasses, of receiver 5.), having an adjustable stop whereby the length ofthe blank is determined.

3. The combination, with the receiver, the cutter-tube, and the slidingcutter, of the feedrollers carried by shafts 10 and 11, a bracket towhich shaft 10 is pivoted, and a set-screw whereby the pressure of theupperfeed-roller is regulated.

4. The combination, with the cutter-tube, sliding cutter, and grippers,of cross-slide 2, to which the sliding cutter is adjustably sccured, andslide 31, whereby the cross-slide is reciprocated.

5. Cross-slide 27, carrying the grippers, and slide 31, whereby saidcross-slide is reciprocated, in combination with cross-head 36,conneetedto the cross-slide, rod 41, having a cheek-nut, lever 38, and spring 40,whereby the outward movement of the cross-slide and grippers isregulated.

G. The combination,with the cross-slide and the grippers, of cross-head36, connected to the cross-slide, a lever pivoted to the crossslide andto a link, 3.), a spring acting to draw the cross-slide and cross-headoutward, and a rod, 4-1, passing through the cross-head and having a nutat its outer end, whereby the outward movement of the cross head andslide is limited, as and for the purpose set forth.

7. The combination, with tube 24., the crossslide, and the grippers, ofthe crosshead connected to the crossslide, lever 38, link 39, spring 40,and rod ell, passing through the cross-head and having a nut, 41,whereby the outward movement of the cross slide and cross-head isadjusted, so that in the outward movement the grippers will stop at theexact position required to receive the wire from tube 2%.

S. The combination, with the cross-slide, block 26, having arms 26, andthe grippers, of screws 28, engaging the cross-slide and having a collarengaged by said arms, whereby the grippers may be moved in or outrelatively to the cross-slide, and a check-nut for locking the parts inposition after adjustment.

9. The combination, with the heading-die, the crossslide, and block 26,carrying the grippers, of screw 28, engaging the cross-slide and havinga collar engaging said block, whereby the grippers may be adjustedrelatively to the cross-slide, so that after forward movement thegrippers will stop with the blank exactly before the recess in theheading-die.

10. The combination, with the header, heading-die, cross-slide,grippers, cutter 25, and tube 24, of screw 28, engaging the cross-slideand connected to the grippers, cross-head 36, acting to draw thecross-slide outward, and an adjustable stop to limit the outwardmovement of the cross-slide, whereby the grippers may be so adjusted asto receive the end of the wire in the outward movement and to leave thesevered blank in front of the die in the inward movement.

11. The combination, with tube 24: and the receiver, of block 26, thegrippers, and the cross-slide to which the block is adjustably secured.

12. The combination, with the heading-die and a receiver having anadjustable stop, of the cutter-tube and the cross-slide carrying cutter25, and the grippers, whereby the length of the blank is determined .andthe severed blank is carried in front of the die.

13. The combination, with the cutter-tube and the crossslide, of block26, cutter 25, and the spring-grippers secured to the block and providedwith steel dies 44:.

1a. The combination, with the heading-die and header, of tube24, thecross-slide, block 26, carrying cutter and spring-grippers, and means,substantially as described, for adjusting said block relatively to thecrossslide and for adjusting the outward movement of the cross-slide.

15. The combination, with the cutter-tube, sliding cutter, and thegrippers, of receiver 59, into which the end of the wire passes, and anadjustable stop in said receiver which de termines the length of theblank.

16. The combination, with the cutter-tube, sliding cutter, and grippers,ofthe receiver having a slot, 60, through which the severed blank iscarried by the grippers.

17. The combination, with the cutter-tube, sliding cutter, and thegrippers, of the re ceiver having slot 60, adjustable stop 61, andmechanism, substantially as described, whereby the stop may be adjustedand locked in position after adjustment.

18. The combination, with the receiver having a key, 59, and a threadedstop having a groove engaged by said key, of gear 62, which is socketedin the receiver and internally threaded to engage the stop, and means,substantially as described, for rotating said gear to adjust the stop.

19. The combination, with the receiver,.

threaded stop 61, andinternally-threaded gear 62, engaging said stop, ofshaft 64, having a bevel-gear, 65, and a gear engaging gear 62, avertical shaft having a bevel-gear engaging gear 65, a tube inclosingthe vertical shaft and slotted at its upper end, and a lock-nut whichclamps the slotted end of the tube upon the vertical shaft to lock theparts in position after adjustment.

20. The combination, with the receiver, the cutter-tube, the slidingcutter, and the grippers, of headingdie 45 and the header.

21. The combination, with the heading-die and header, of thecutter-tube, the receiver, the sliding cutter, and the grippers, wherebythe blank is severed and carried forward ready to be forced into the dieby the header.

22. The combination, with the heading-die having a recess in which thebolt-head is formed and the header, of plunger 73, having a reduced endcorresponding in diameter with the blank, a stop, 7 6, and a train ofmechanism, substantially as described and shown, which permits said stopto yield in the formation of a bolt-head, so that in upsetting the metalit is forced into the forward portion of the recess in the heading-die.

23. The header, slide 48, and eccentric-rod 57, in combination with theplunger, stop 76, and a train of mechanism, substantially as describedand shown, which permits said stop to yield in the formation of eachbolt-head, as and for the purposeset forth.

24. The header, slide 48, and eccentric-rod 57, in combination with theplunger having a collar, 87, block 82, which slides on the plunger, andconnecting mechanism, substantially as described,between said block andslide 48,

whereby in the return movement said slide engages collar 87 and forcesthe plunger backward to expel the headed bolt.

25. The combination, with the slide, header, heading-die, and theplunger having collar 87, of block 82, sliding on the plunger, lever 83,pivoted to said block and to a link, 84, and rod 86, connecting saidlever with the slide, as and for the purpose set forth.

26. In a bolt-heading machine, the combination, with slide 48,eccentric-rod 57, the header, heading-die, and plunger, of stop 76 and atrain of mechanism, substantially as described and shown, which permitssaid stop to yield at predetermined times, as and for the purpose setforth.

27. The combination, with the header, heading-die, and plunger, ofthreaded stop 76, slide 77, carrying said stop, and gearing,substantially as described, for adjusting the stop in the slide.

28. The combination, with the heading-die, the header, and plunger 73,of slide 7 7 having a key, 7 7, a threaded stop in said slide having agroove engaged by said key, gear 78, socketed in the slide andinternally screwthreaded to engage the stop, and means, substantially asdescribed, for rotating said gear to adjust the stop in or out.

29. The combination, with plunger 73, slide 7 7, and adjustable stop 76, of angle-block 89 and toggle 93.

30. The combination, with the header, heading-die, and plunger, ofthreaded stop 7 6, slide 7 7, internally-threaded gear 7 8, which isengaged by the stop and is socketed in the slide, and shaft 80, carryinga gear engaging gear 78, whereby the stop may be adjusted.

31. The combination, with the header, headingdie, plunger, and stop 7 6,of slide 7 7, by which the stop is carried, swinging angleblock 89, andtoggle 93, engaging the slide and angle-block, whereby the slide ispermit-.

ted to yield backward at a predetermined time.

32. The combination, with the eccentricrod having downwardly-extendingarm 58, the header, heading-die, plunger, and slide 7 7, carrying astop, of angle-block 89, toggle 93, engaging the angle-block and slide 77, slide 96, having a cam-slot engaged by the angleblock, and a rodconnecting slide 96 with arm 58.

33. The eccentric-rod having arm 58, the header, plunger, and slide 77,having a stop, in combination with angle block 89, hav ing a roller, 94,toggle 93, engaging slide 77 and the angle-block, slide 96, having acamgroove engaged by said roller, and a rod connecting slide 96 with arm58,-whereby at a certain stage of the heading of a bolt slide 77,carrying the stop for the plunger, is allowed to yield, so that theblank is forced farther backward and a perfect head is formed withoutdanger of binding in the die.

34. The combination, with the eccentric-rod having downwardly-extendingarm 58, slide IIO 4-8, the header, die, and plunger, of slide 7 7,carrying a stop, angle-block 89, toggle 93, slide 06, engaged by theangle-block, and an adjustable rod, 98, connecting slide 96 with arm 58.

35. The combination, with the plunger, of slide 7 7, carrying anadjustable stop, and mechanism-for example, an angle-block, toggle, andslide-which permits the stop to yield at a predetermined time.

36. The con'ibination, with the plunger, of slide 77, recessed in theframe-work, internally-threaded gear 78, recessed in said slide,threaded stop 7 (i, engaging the gear, and a shaft carrying a gearengaging gear 7 8, whereby the stop may be adjusted.

37. Ina bolt-heading machine, the combination, with slide 7 7, carryingstop 7 ('5, of angle-bloek 89, carrying roller 9i, toggle 93, engagingthe angle-block and the slide, and a slide, ()6, having a cam-slotengaged by said roller.

38. The fl'ftlllG-WOJk having recess 100, the stop 76, and slide 77,lying partly Within said recess, in combination with the angle-block,toggle, and slide 96, whereby the slide and stop are held firmly duringthe first portion of the operation of heading and are then allowed toyield, as and for the purpose set forth.

39. The eccentric-rod, slide 48, the header, die, and the plunger havinga collar, 87, in combination with block 82, through which the plungerslides, lever 83, pivoted to the block and to link 84, and an adjustablerod connecting lever 83 with slide 48, whereby the throw of the plungerin expelling the headed bolt may be regulated.

In testimony whereof I affix my signature in presence of two witnesses.

ELLVVOOD BURDSALL, JR.

VVitn esses:

A. M. WoosTER, A. B. FAIROHILD.

